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SECURITY REPORT · EXTENSHI SCAN

MetaMask – Crypto Wallet

Firefox extension·by MetaMask
30
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.

Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue

How it ranks

MetaMask – Crypto Wallet's safety score vs every other extension we've scanned
Globally
29.739999999999995%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
19.739999999999995%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
366
median 38Lower is safer
Risky permissions
6
median 1Critical + high perms
Total permissions
17
median 4All declared perms
Critical findings
0
median 2Severity = Critical

Findings breakdown

Automated security signal · 366 distinct issues across 6 severities
366
distinct issues
detected
Scanners reported 740 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

6 risky permissions of 17 total
6 high-risk permissions require attention
This extension requests 17 permissions in total. 6 of them grant broad capabilities that are worth a careful look.
High
Access all HTTP sites

Can read and modify content on all non-encrypted websites

High
Access all HTTPS sites

Can read and modify content on all encrypted websites

High
Observe web requests

Can monitor all network requests made by the browser

High
Block and modify web requests

Can intercept, block, or modify any network request before it completes

High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
Access local files

Can read files on your local filesystem opened in the browser

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Unlimited local storage

Can store large amounts of data locally without size limits

Medium
Write to clipboard

Can place content onto your clipboard

Medium
Access current tab

Can temporarily access the content of the active tab when you click the extension

Medium
Show notifications

Can display desktop notifications outside the browser

Medium
Access user identity

Can get OAuth2 tokens and access your Google account identity

Medium
Read clipboard

Can read text and data currently on your clipboard

Info
ws://*/*

No additional information available.

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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
Browser extensions made transparent.